Pattern-chain roll for looms



- C. M. WHITMORE PATTERN CHAIN ROLL FOR LOOMS Filed March 17. 1922 Patented Oct. 23, 1923.

UMFTED J TA Es CHARLES M. WHITMORE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

PATTERN-CHAIN ROLL ron LOOMS.

Application filed March 17, 1922. Serial No. 544,572.

To all whom it may'conce'm Be it known that I, CHARLES M. WHIT- rronu, acitizen of the United States, residpattern chain. Such chains are commonly: composed of a large number ofcross rods or shafts connectedby suitable chain llnks and having a greater or less numberof rolls mounted on each cross rod. The

aggregate number ofrollsemployed is often very great.

It is the object of my invention to provide a pattern chain roll for such purposes, which may be economically manufactured and which will prove satisfactory and reliable in use.

A preferred form of my invention is shown in the drawings in which-.

Fig. 1 is aside elevation showing a portion of a pattern chain and a supporting shaft therefor; M

Fig. 2 is a sectional end view taken along the line 22 in Fig. 1;

. Figs. 3, 4 and 5 are front, sectional, and rear views of one of the rolls, and

Fig. 6 is a sectional elevation of a roll and cross rod, showing a slight modification.

Referring to the drawings, I have shown a shaft 10 having sprockets 11 on which is mounted a pattern chain comprising cross rods 12 connected by links 13. The pattern is formed on the rods 12 by variably positioning rolls 14 and spacing sleeves15 along the length of the rod. Any suitable means may be provided for intermittently moving the shaft 10 and advancing the pattern chain.

The construction of the rolls 14 is clearly shown in Figs. 3, 4 and 5, each roll comprising a flat tread portion 16, a hub or."

earing 17, and a web 18. The hub 17 is of somewhat greater length'tha-n the widith of the tread 16 and projects beyond both edges of the tread as shown in Fig. 4. i The web'18 is preferably disposed atone side of the tread, as also shown in Fig. .4, one side of the web forming a substantially continuous surface with the adjacent edge of the tread 16. The positioning of the web at one extreme edge of the tread is a matter of considerable importance, both in the actual use of the device and also in v the process of manufacture.

The rolls 14 are subject to more or less rough usage and careless handling in the mills and factories and the edges of the i tread frequently become chipped or broken,

Sometimes seriously interfering with the proper operation of the pattern mechanism- The edges are also sometimes broken in lifting the vibratorlevers in the normal operation oftheloom.

With my improved construction, the

liability of such injury to the rolls is reit duced by at least one half, as one edge of the. tread is so strengthened and supported by the web 14 that injury thereto is very improbable.

A roll thus constructed may be economically manufactured by forming the rolls direct from bar stock, the boring and shap ing and sizing operations being performed on the end of the bar stock and a cuttingofgltool of the usual form completing the ro I In Fig. 6, I have "shown a roll 20 closely resembling the roll 14, but having a hub 21 formed of substantially the same diameter as the spacing sleeves 15. This permits a lever 22 to complete its movement toward the shaft 12 even if slightly'misplaced laterally, as indicated in Fig. 6, so that it over-.

laps the adjacent end of the hub 21. Uni

form lift of the vibrator rendered, certain.

The provision of hub ends of the same levers is thus diameter as the spacing sleeves also prevents wedging orsticking of the hubs between the teeth of the driving sprockets,

when 'a roll is so positioned that its hub overlaps the edge of the sprocket.

Having thus described my invention and I the advantages thereof, I do not Wish to be limited to the details herein disclosed otherwise than as set forth in the claim, but What I do claim is A pattern chain roll for looms comprising a. flat tread portion, a hub and a continuous Web connecting said tread and hub,

said hub being of greater length than the Width of the tread and projecting on both sides beyond the edges thereof and one side 10 of said Web forming a surface substantially continuous with one edge of said tread.

In testimony whereof I have hereunto affixed my signature.

CHARLES M. WHITMOREt 

